Nummer: 03913
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 18.12.1940 |
| Time of attack : | 05:35 |
| Nationality of U-boat : | Italian |
| U-boat : | CALVI |
| Commander : | Caridi |
| Grid : | 54.14n 19.34w |
| presumed target type : | Armed Merchant Cruiser |
| presumed result : | target visibly missed |
| Number of torpedoes/mines : | 2 |
| Used weapon(s) : | Torpedo(es) + Gunfire |
| Date of observation : | 18.12.1940 |
| Time of observation : | 06:50 |
| Nationality of target : | British |
| Actual type of target : | Armed Merchant Cruiser |
| Name of target : | Worcestershire |
| Year of launch : | 1931 |
| Actual tonnage : | 11402 BRT |
| Actual result : | target visibly missed |
| Position of target : | 54.14n 21.46w |
| Footnote : | "Calvi" missed an armed merchant cruiser with 2 torpedos and 10x12cm gunfire. The attacked steamer answered the fire with artillery. |
| updated on: | 28.04.2013 |
| Remark: | M/P Worcestershire |
| Changes: | 1) Torpedoschusskartei 03-2013: Fehlschuss 2) Admirality War Diary: AMC Worcestershire |